Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012

Optimize a model with 131 rows, 54 columns and 262 nonzeros
Presolve removed 33 rows and 5 columns
Presolve time: 0.00s
Presolved: 98 rows, 49 columns, 206 nonzeros
Variable types: 0 continuous, 49 integer (49 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.450000e+01, 64 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   24.50000    0   45   20.00000   24.50000  22.5%     -    0s
H    0     0                      21.0000000   24.50000  16.7%     -    0s
     0     0   23.50000    0   37   21.00000   23.50000  11.9%     -    0s
     0     0   23.30000    0   49   21.00000   23.30000  11.0%     -    0s
H    0     0                      22.0000000   23.30000  5.91%     -    0s
     0     0   23.00000    0   42   22.00000   23.00000  4.55%     -    0s
     0     0     cutoff    0        22.00000   22.99998  4.55%     -    0s

Cutting planes:
  Zero half: 28

Explored 0 nodes (150 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%